Concentration of A in water = mass of A/volume of water = 0.24/100 = 0.0024 g/mL Concentration of A in ether = mass of A/volume of ether = 2.70/100 = 0.027 g/mL Partition coefficient = concentration of A in ether/concentration of A in water = 0.027/0.0024 = 11.25 Solution Concentration of A in water = mass of A/volume of water = 0.24/100 = 0.0024 g/mL Concentration of A in ether = mass of A/volume of ether = 2.70/100 = 0.027 g/mL Partition coefficient = concentration of A in ether/concentration of A in water = 0.027/0.0024 = 11.25.